﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

namespace DL
{
    public class UserService : Service, IDisposable
    {
        public bool Authenticate(string userName, string passWord, out User userObject)
        {
            var password = passWord;//CalculateMD5Hash(passWord);
            userObject = context.Users.Where(x => x.UserName == userName && x.Password == passWord).FirstOrDefault();
            if (userObject != null)
            {
                return true;
            }
            return false;
        }

        public string CalculateMD5Hash(string input)
        {
            // step 1, calculate MD5 hash from input
            MD5 md5 = System.Security.Cryptography.MD5.Create();
            byte[] inputBytes = System.Text.Encoding.ASCII.GetBytes(input);
            byte[] hash = md5.ComputeHash(inputBytes);

            // step 2, convert byte array to hex string
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < hash.Length; i++)
            {
                sb.Append(hash[i].ToString("X2"));
            }
            return sb.ToString();
        }

        public void Dispose()
        {
            //throw new NotImplementedException();
        }
    }
}
